DevSecOps is a concept that integrates security practices into the DevOps process to ensure rapid software delivery while maintaining security.
DevSecOps emphasises automating security checks and embedding security early in the software development lifecycle.
The primary benefit is reducing vulnerabilities while maintaining the speed and agility in development that DevOps brings.
The DevSecOps acronym comes from the three words Development, Security and Operations.
Further reading
Secure DevOps environments for Zero Trust (Microsoft Learn)